Shuttle-spindle.



PATENTED APR. 2, 1907.

W. KOBE-LEE.

SHUTTLE SPINDLE.

APPLICATION FILED AUG. 25, 1905.

FIG. 3.

FIG.

INVE NTOR M By 14 zzomeys,

WITNESSES:

UNITED STATES PATENT OFFICE.

WILLIAM KOEHLER, OF FULTON, NEW YORK, ASSIGNOR TO AMERICAN TE TILESPECIALTY MACHINERY COMPANY, OF NEW YORK, N. Y., A COR- PORATION OF NEWYORK.

SHUTTLE-SPINDLE.

No. seaove.

Specification of Letters Patent.

katenteci April 2, 1907.

Application filed August 25,1905. Serial No. 275,718.

To all whom it may concern.

Be it known that I, WILLIAM KonnLnn, a citizen of the United States,residing at Fulton, in the county of Oswego and State 7 of New York,have invented certain new and useful Improvements in Shuttle-Spindles,of which the following is a specification.

This invention aims to provide an improvement in spindles, whereby thequills or bobbins or cop-tubes are easily applied upon the spindle andeasily withdrawn therefrom, but are retained thereon very firmly, so asto avoid displacement under the shocks which result from the throwing ofthe shuttle back and forth. For this purpose a screw-thread of veryslight pitch is provided on a suitable portion of the spindle, the pitchbeing so slight as to lock the cop-tube or the like against longitudinalmovement in the direction of the spindle, and therefore to lock itagainst displacement by the shocks which it sustains in the throwing ofthe shuttle. At the same time this construction permits of very easilyremoving the tube by first giving it a very slight unscrewing motion.The effectiveness of the threads to bite into the paper or othermaterial of the tube is increased by one or more grooves runninglongitudinally of the spindle, and forming, where such groove crosseseach of the screw threads, a point of metal, which readily enters thematerial of the tube, so as to cut spiral threads on the inner face ofthe tube, and forming a firm lock between the tube and the spindle.

The accompanying drawings illustrate embodiments of the invention.

Figure 1 is an elevation of a solid steel spindle. Fig. 2 is anelevation, partly in section, of a split spindle. Fig. 3 is an elevationof the spindle of Fig. 2 looking in a direction at right angles to thatof Fig. 2. Fig. l is a cross section on the line 4 4 of Fig. 1.

Referring to the embodiments of the invention illustrated and first toFig. 1, A is a solid steel spindle tapered as usual. Upon any desiredportion of said spindle there is cut a screw-thread B of very slightpitch, so as to run approximately at right angles to the spindle and topractically lock the tube against yielding to longitudinal shocks.

Ordinarily it will only be found necessary to run the thread B over acomparatively short portion of the spindle, as shown, since each threadholds the tube with considerable force. The cop, with the usual interiorpaper tube, is applied to the spindle in the ordinary manner by shovingit hard over the tapered end. Ordinarily the friction of its engagementwith the spindle is depended upon to hold it in place. In the presentcase, however, after it is shoved down upon the spindle it is given apartial turnsay a halfturn to the right(supposing a right-hand thread beused.) By this additional twist the comparatively sharp threads B engagethe inner surface of the tube sufliciently to force it more tightly downtoward the heel of the spindle and at the same time, which is veryimportant, to form internal threads in the tube in engagement with thethreads .13. The engagement between the two sets of threads is thennearly normal to the length of the spindle and holds the tube on thespindle, even in broad looms of the highest speed. It is even difficultto withdraw the empty tube by pulling it longitudinally; but by givingit a short turn to the left the screw threads force it toward thesmaller end of the spindle and permit its ready withdrawal. The wearupon the inner surface of the tube is comparatively slight, and evenpaper tubes may be used on these spindles from ten to fifty times. Theelasticity of the tube and the sharp edge of the thread are dependedupon to force the material into the screwthreads B, and the very leastelasticity is suflicient for the purpose. The threads are preferably cutflush with the smooth tapered surface of the spindle, or even minutelybelow such surface. They should be at most flush therewith, so as tooppose no obstruction to the longitudinal thrusting of the tube upon thespindle. In the further rotation and slight advancement the sharp edgesof the teeth engage the cop sufficiently to cut into the same and holdit firmly. I have found by experiment that the engagement of the threadswith the tube is effected more readily and more deeply by providing oneor more grooves C, (preferablylongitudinal,) which intersect thescrew-threads and leave substantially triangular projecting points,

such as D, which cut or chisel a deep thread into the inner surface ofthe tube from the beginning of the twisting movement. These longitudinalgrooves by breaking the continuity of the threads also prevent the tubefrom unscrewing as readily as would be the case with a smooth continuousthread. Thus they add to the locking effect of the slight pitch of thethreads, and they permit the use of threads of greater pitch, if thatwere desirable for any other reasons.

The principle of this invention may be very conveniently applied tosplit spindles, either solid or hollow. The latter type is illustratedin Fig. 2, the thread being there shown as applied to the sheet-steelspindle of Patent No. 790,611, May 23, 1905, to Bell. Here the spindleis made of two halves E and F, pressed out of sheet-steel, and eithermade of spring metal themselves or provided with an interposed spring,so that they tend to separate to provide a space G between them. It isusual to automatically press the'two halves E and F together when a tubeis to be applied thereto. Nevertheless the space G serves to an extentas the equivalent of the grooves O of Fig. 1 in producing sharp points Don the threads B, which enable them to more readily enter the materialof the tube and in roughening the threads, so as to prevent too easyunscrewing of the tube. At the same time it is preferred not to dependon the space G alone for this purpose, but to provide also grooves C atthe centers of the halves E and F, as shown in Fig. 3.

The invention is of particular importance when a plied to this type ofspindle because of the 'acility with which the thread can be formed. Thehalf-thread on each of the two members E and F may be, in fact, stampedin the metal by the same operation which stamps the half-cone shape, andthe groove 0 may also be formed in the same operation.

Though I have described with great particularity of detail certainspecific embodiments of my invention, yet it is not to be understoodtherefrom that the invention is lim ited to the particular embodimentsdisclosed. Various modifications thereof in detail and in thearrangement and combination of the parts may be made by those skilled inthe art without departure from the invention.

What I claim is 1. A shuttlespindle having a smooth tapered surface overthe principal part of its length and provided over a portion of itslength with a screw-thread having a sharp edge adapted to readily cutinto a cop-tube.

2. A shuttle-spindle provided over a portion of its length with ascrew-thread having a sharp edge adapted to readily cut into a cop-tubeand of such slight pitch as to lock the tube in engagement with saidthread against longitudinal movement, said spindle having a smoothtapered surface projected outward at least as far as the outer edge ofsaid threaded portion.

8. A shuttle-spindle provided with transverse threads having a sharpedge adapted to readily cut into a tube, and a longitudinal grooveinterrupting said screw-thread and forming sharp points for saidthreads.

4. A shuttle-spindle provided over a portion of its length with ascrew-thread having a sharp edge adapted to readily cut into a cop-tubeand of such slight pitch as to be at approximately a right angle to theaXis of the spindle and to lock the tube in engagement with said threadagainst longitudinal movement, a longitudinal groove being extendedacross said thread.

5. A shuttle-spindle composed of hollow segmental portions, and having ascrewthread formed thereon with a sharp edge adapted to readily cut intoa cop-tube and of such slight pitch as to lock the tube in engagementwith said thread against longitudinal movement.

6. A shuttle-spindle composed of hollow segmental portions, and having ascrewthread formed thereon with a sharp edge adapted to readily cut intoa cop-tube and of such slight pitch as to lock the tube in engagementwith said thread against longitudinal movement, and a grooveinterrupting said screw-thread and forming sharp points to readily enterthe material of the tube.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

WVILLIAM 'KOEHLER. Witnesses:

D. M. SULLIVAN, A. S. KALAR.

